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Stainless steel capillary tube

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What is stainless steel capillary tube?

Capillary tubes are widely used in the instrumentation industry. The Stainless Steel Capillary Tube is available in a small bore size and its precise thickness would depend on the specific client requirements. The tubes can be found in critical applications like nuclear reactors, aerospace equipment, etc. The 304 Stainless Steel Capillary Tube is essential for showing high performance in the liquid chromatography equipment. Being made of different grades of ss, the capillary tubes possess a continuous grain structure.

The SS Capillary Tube Seamless shows better performance as welded ones can create discontinuity in the pipe, which leads to crevice corrosion and mechanical failures. They come with a simple design without any moving parts and the expansion function is caused by the pressure drop.

316 SS capillary tubing manufacturer in India

Stainless steel capillary tube manufacturer in India

Features & advantages of ss capillary tubes

The SS Capillary Tubes Suppliers offer the tubes made from a single piece of homogenous steel. It has a continuous and uninterrupted grain structure. They can be suitably used for applications that need consistent material throughout the tubing length. Weldings and mechanical fittings on the Stainless Steel Needle Tubing can create discontinuity and lead to crevice corrosion. The discontinuity can also lead to mechanical failures.

  • The use of high quality material helps form a passive protective layer on the surface in the presence of oxygen.
  • They have high reliability, are quite accessible and show good friction resistance.
  • The manufacturing process of SS micro tubing is quite simple and tubes are affordable too.

Due to these features and advantages these capillary tubes are widely used in many applications like HPCL tubing, hydraulic tubing and many more.

SS capillary tubes supplier in Gujarat, we offer Stainless steel capillary tubing from 0.30 mm to 8.00 mm

Stainless steel capillary tube

Stainless steel capillary tube

SS capillary tubes

SS capillary tubes

304 Stainless steel capillary tube

304 Stainless steel capillary tube

Why use 316 stainless steel capillary tubing?

  • The 316 Stainless Steel Capillary Tubing show good performance at elevated temperatures.
  • The grade 316 material comes with excellent weldability and machinability.
  • It shows good resistance to corrosion, including pitting.
  • The 316 SS Capillary Tubing material has an austenitic structure. This helps to retain its toughness even at cryogenic temperatures.

304 Stainless steel capillary tube and SS capillary tube seamless are available in 1–6 meter long length

Table of Contents


Stainless steel capillary tube manufacturer

Specifications of SS capillary tube seamless

Size  Wall Thickness Application
1 to 10mm OD Seamless & Welded
  • Petrochemical
  • Fluid, gas and oil industry
  • Environmental protection
  • Electricity
  • Instrumentation
Mill Test Certificate Stainless steel capillary tube price Grades
EN10204 3.1 ₹ 325/Kg

SS 304, SS 316,

SS 304L,SS 316L
Outside Diameter Packing Finish
0.3 –12.0 mm Ends Capped, Wooden Boxed,Sleeved Pickled, Polished, Bright Annealed, Electrolytic Polished
SS evaporator coil capillary tube and Stainless steel needle tubing in grade 304, 304L, 316, 316L & 317L

SS capillary tubes types

SS capillary tube seamless

SS capillary tube seamless

Stainless steel capillary tubing

Stainless steel capillary tubing

316 Stainless steel capillary tubing

316 Stainless steel capillary tubing

1/16 capillary tubing

1/16 capillary tubing

316 SS capillary tubing

316 SS capillary tubing

SS evaporator coil capillary tube

SS evaporator coil capillary tube

Stainless steel needle tubing

Stainless steel needle tubing

SS micro tubing

SS micro tubing

Stainless steel HPLC tubing

Stainless steel HPLC tubing

Stokcist of 316 Stainless steel capillary tubing and Stainless steel HPLC tubing suitable for Nuclear power industry

Stainless steel capillary tube sizes

Outside Dia (mm) Inside Dia (mm) Wall thickness (mm)
2.00 0.10 0.95
2.50 0.08 1.21
3.00 0.20 1.40

Hs code of SS capillary tube

7411

304 stainless steel capillary tube tubing sizes

WALL THICKNESS (WT) OUTSIDE DIA
milimeter Inches milimeter
00.20 1/32 00.79
00.20 00.040 1.02
00.20 00.049 1.25
00.20 00.050 1.27
00.15 / 0.20 / 0.25 / 0.30 / 0.40 / 0.51 / 0.56 1/16 1.63
00.30 / 0.50 / 0.70 / 0.90 00.118 3.00
00.20 / 0.25 / 0.51 / 0.81 / 0.91 / 1.22 1/8 3.18
00.40 00.138 3.51
00.25 / 0.40 / 0.56 / 0.71 / 0.91 5/32 3.97
00.70 / 0.90 / 1.00 00.157 4.00
00.23 00.072 1.83
00.25 00.083 2.11
00.15 / 0.20 / 0.30 / 0.40 / 0.51 / 0.91 3/32 2.38
00.50 00.177 4.50
00.13 / 0.20 / 0.25 / 0.40 / 0.46 / 0.51 / 0.56 / 0.71 / 0.81 / 0.91 / 1.22 / 1.63 3/16 4.76
00.50 / 0.75 / 1.00 / 1.50 00.197 5.00

Pressure rating of stainless steel capillary tubing

Sizes Minimum (Psi) yield Strength Average Wall Inches Minimum (Psi) tensile Strength Theoretical Burst Pressure * (Psi) Theoretical (Psi) Yield Point ** (Psi) Working Pressure 25% Of Burst Collapse Pressure(Psi)
0.375 30,000 0.065 75,000 39,796 15,918 9,949 8,597
0.500 0.020 6,522 2,609 1,630 2,304
0.500 0.028 9,459 3,784 2,365 3,172
0.500 0.035 12,209 4,884 3,052 3,906
0.500 0.049 18,284 7,313 4,571 5,304
0.500 0.065 26,351 10,541 6,588 6,786
0.500 0.083 37,275 14,910 9,319 8,307
0.625 0.020 5,128 2,051 1,282 1,859
0.625 0.028 7,381 2,953 1,845 2,568
0.625 0.035 9,459 3,784 2,365 3,172
0.625 0.049 13,947 5,579 3,487 4,335
0.625 0.065 19,697 7,879 4,924 5,591
0.625 0.083 27,124 10,850 6,781 6,910
0.250 0.020 14,286 5,714 3,571 4,416
0.250 0.028 21,649 8,660 5,412 5,967
0.250 0.035 29,167 11,667 7,292 7,224
0.250 0.049 48,355 19,342 12,089 9,455
0.250 0.065 81,250 32,500 20,313 11,544
0.375 0.020 8,955 3,582 2,239 3,029
0.375 0.028 13,166 5,266 3,292 4,145
0.375 0.035 17,213 6,885 4,303 5,077
0.375 0.049 26,534 10,614 6,634 6,816
0.625 0.095 32,759 13,103 8,190 7,734
0.625 0.109 40,172 16,069 10,043 8,639
0.750 0.028 6,052 2,421 1,513 2,156
0.750 0.035 7,721 3,088 1,930 2,669
0.750 0.049 11,273 4,509 2,818 3,664
0.750 0.065 15,726 6,290 3,931 4,749
0.750 0.083 21,318 8,527 5,330 5,905
0.750 0.095 25,446 10,179 6,362 6,637
0.750 0.109 30,733 12,293 7,683 7,453
0.750 0.120 35,294 14,118 8,824 8,064
0.875 0.020 3,593 1,437 898 1,340
0.875 0.028 5,128 2,051 1,282 1,859
0.875 0.035 6,522 2,609 1,630 2,304
0.049 9,459 2,365 3,172 3,784
0.875 0.065 13,087 5,235 3,272 4,126
0.875 0.083 17,560 7,024 4,390 5,152
0.875 0.095 20,803 8,321 5,201 5,807
0.875 0.109 24,886 9,954 6,221 6,543
0.875 0.120 28,346 11,339 7,087 7,100
1.000 0.028 4,449 1,780 1,112 1,633
1.000 0.035 5,645 2,258 1,411 2,027
1.000 0.049 8,149 3,259 2,037 2,796
1.000 0.065 11,207 4,483 2,802 3,647
1.000 0.083 14,928 5,971 3,732 4,567
1.000 0.095 17,593 7,037 4,398 5,159
1.000 0.109 20,908 8,363 5,227 5,827
1.000 0.120 23,684 9,474 5,921 6,336
1.000 0.134 27,459 10,984 6,865 6,963
1.250 0.035 4,449 1,780 1,112 1,633
1.250 0.049 6,380 2,552 1,595 2,260

316 stainless steel capillary tubing tolerance

SIZE OD NOMINAL WALL THK LENGTH TOLERANCE OUTSIDE DIA TOLERANCE WALL THK. TOLERANCE
(inch) (milimeter) (inch) (milimeter) (inch) (inch) (milimeter) (milimeter) (%)
½ 12.7 0.065 1.65 +⅛, -0 +/-0.005 +/-0.13 +3.18, -0 +/-10.0%
¾ 19.1 0.065 1.65 +⅛, -0 +/-0.005 +/-0.13 +3.18, -0 +/-10.0%
1 25.4 0.065 1.65 +⅛, -0 +/-0.005 +/-0.13 +3.18, -0 +/-10.0%
2 50.8 0.065 1.65 +⅛, -0 +/-0.008 +/-0.20 +3.18, -0 +/-10.0%
2½ 63.5 0.065 1.65 +⅛, -0 +/-0.010 +/-0.25 +3.18, -0 +/-10.0%
3 76.2 0.065 1.65 +⅛, -0 +/-0.010 +/-0.25 +3.18, -0 +/-10.0%
1½ 38.1 0.065 1.65 +⅛, -0 +/-0.008 +/-0.20 +3.18, -0 +/-10.0%
4 101.6 0.083 2.11 +⅛, -0 +/-0.015 +/-0.38 +3.18, -0 +/-10.0%
6 152.4 0.109 2.77 +1, -0 +/-0.030 +/-0.76 +25.4, -0 +/-10.0%

Capillary tube dimensions

Gauge Extra Thin Wall (XTW) mm Regular Wall (RW) mm Thin Wall (TW) mm Outside Diameter Tolerance mm Ultra Thin Wall (UTW) mm
22 0.077 – 0.102 0.140 – 0.165 0.096 – 0.121 0.711 – 0.723 0.051 – 0.102
21 0.140 – 0.165 0.102 – 0.127 0.812 – 0.825 0.051 – 0.102
20 0.108 – 0.165 0.108 – 0.134 0.901 – 0.914
19 0.070 – 0.108 0.166 – 0.216 0.102 – 0.140 1.054 – 1.079
18 0.083 – 0.121 0.191 – 0.241 0.127 – 0.165 1.257 – 1.282 0.051 – 0.102
17 0.083 – 0.127 0.177 – 0.229 0.115 – 0.152 1.460 – 1.485 0.057 – 0.102
16 0.096 – 0.133 0.204 – 0.254 0.127 – 0.165 1.638 – 1.663 0.070 – 0.121
15 0.096 – 0.134 0.204 – 0.254 0.127 – 0.165 1.816 – 1.841 0.070 – 0.121
14 0.114 – 0.165 0.216 – 0.292 0.165 – 0.229 2.082 – 2.133 0.076 – 0.134
28 0.076 – 0.102 0.355 – 0.368
27 0.089 – 0.115 0.064 – 0.089 0.406 – 0.419
26 0.089 – 0.114 0.457 – 0.469
25 0.115 – 0.140 0.089 – 0.114 0.508 – 0.520
24 0.114 – 0.140 0.089 – 0.114 0.558 – 0.571 0.051 – 0.102
23 0.140 – 0.165 0.089 – 0.114 0.635 – 0.647 0.051 – 0.102
13 0.267 – 0.343 0.191 – 0.267 2.387 – 2.438
12 0.267 – 0.321 2.743 – 2.749
11 0.293 – 0.368 0.216 – 0.292 3.023 – 3.073
10 0.318 – 0.394 0.216 – 0.292 3.378 – 3.429

Mechanical properties of 316 SS capillary tubing

Materials Elongation %, Min Yield Strength Tensile Strength Heat Temperure
Ksi (MPa), Minimum. Ksi (MPa), Minimum. Treatment Minimum.
º F(º C)
TP304L 35 25(170) 70(485) Solutions 1900 (1040)
TP316L 35 25(170) 70(485) Solutions 1900(1040)
TP304 35 30(205) 75(515) Solutions 1900 (1040)
TP316 35 30(205) 75(515) Solutions 1900(1040)

SS evaporator coil capillary tube advantages

  • High Strength
  • Resistant High Mechanical Stresses
  • Resistant to High Temperature
  • Good Formality

Stainless steel needle tubing chemical composition

Elements 316 UNS S31600 304 UNS S30400 304L UNS S30403 316L UNS S31603
(Mn) Manganese, max 2 2 2 2
(Si) Silicon, max 1 1 1 1
(Mo) Molybdenum 2.0 - 3.0 N/A N/A 2.0 - 3.0
(Fe) Iron Bal. Bal. Bal. Bal.
(Ni) Nickel 10.0 - 14.0 8.0 - 11.0 8.0 - 12.0 10.0 - 14.0
(P) Phosphorus, max 00.045 00.045 00.045 00.045
(S) Sulfur, max 00.03 00.03 00.03 00.03
(C) Carbon, max 00.08 00.08 00.035 00.035
(Cr) Chromium 16.0 - 18.0 18.0 - 20.0 18.0 - 20.0 16.0 - 18.0
(Cu) Copper N/A N/A N/A N/A
(N) Nitrogen N/A N/A N/A N/A

SS micro tubing equivalent

GRADE UNS NO DIN/WERKSTOFF
SS 304L S30403 1.4306
SS 316L S31603 1.4404
SS 304 S30400 1.4301
SS 316 S31600 1.4436